2 * Chromium OS cros_ec driver
4 * Copyright (c) 2012 The Chromium OS Authors.
6 * SPDX-License-Identifier: GPL-2.0+
10 * This is the interface to the Chrome OS EC. It provides keyboard functions,
11 * power control and battery management. Quite a few other functions are
12 * provided to enable the EC software to be updated, talk to the EC's I2C bus
13 * and store a small amount of data in a memory which persists while the EC
25 #include <asm/errno.h>
27 #include <asm-generic/gpio.h>
28 #include <dm/device-internal.h>
30 #include <dm/uclass-internal.h>
33 #define debug_trace(fmt, b...) debug(fmt, #b)
35 #define debug_trace(fmt, b...)
39 /* Timeout waiting for a flash erase command to complete */
40 CROS_EC_CMD_TIMEOUT_MS
= 5000,
41 /* Timeout waiting for a synchronous hash to be recomputed */
42 CROS_EC_CMD_HASH_TIMEOUT_MS
= 2000,
45 DECLARE_GLOBAL_DATA_PTR
;
47 /* Note: depends on enum ec_current_image */
48 static const char * const ec_current_image_name
[] = {"unknown", "RO", "RW"};
50 void cros_ec_dump_data(const char *name
, int cmd
, const uint8_t *data
, int len
)
57 printf("cmd=%#x: ", cmd
);
58 for (i
= 0; i
< len
; i
++)
59 printf("%02x ", data
[i
]);
65 * Calculate a simple 8-bit checksum of a data block
67 * @param data Data block to checksum
68 * @param size Size of data block in bytes
69 * @return checksum value (0 to 255)
71 int cros_ec_calc_checksum(const uint8_t *data
, int size
)
75 for (i
= csum
= 0; i
< size
; i
++)
81 * Create a request packet for protocol version 3.
83 * The packet is stored in the device's internal output buffer.
85 * @param dev CROS-EC device
86 * @param cmd Command to send (EC_CMD_...)
87 * @param cmd_version Version of command to send (EC_VER_...)
88 * @param dout Output data (may be NULL If dout_len=0)
89 * @param dout_len Size of output data in bytes
90 * @return packet size in bytes, or <0 if error.
92 static int create_proto3_request(struct cros_ec_dev
*dev
,
93 int cmd
, int cmd_version
,
94 const void *dout
, int dout_len
)
96 struct ec_host_request
*rq
= (struct ec_host_request
*)dev
->dout
;
97 int out_bytes
= dout_len
+ sizeof(*rq
);
99 /* Fail if output size is too big */
100 if (out_bytes
> (int)sizeof(dev
->dout
)) {
101 debug("%s: Cannot send %d bytes\n", __func__
, dout_len
);
102 return -EC_RES_REQUEST_TRUNCATED
;
105 /* Fill in request packet */
106 rq
->struct_version
= EC_HOST_REQUEST_VERSION
;
109 rq
->command_version
= cmd_version
;
111 rq
->data_len
= dout_len
;
113 /* Copy data after header */
114 memcpy(rq
+ 1, dout
, dout_len
);
116 /* Write checksum field so the entire packet sums to 0 */
117 rq
->checksum
= (uint8_t)(-cros_ec_calc_checksum(dev
->dout
, out_bytes
));
119 cros_ec_dump_data("out", cmd
, dev
->dout
, out_bytes
);
121 /* Return size of request packet */
126 * Prepare the device to receive a protocol version 3 response.
128 * @param dev CROS-EC device
129 * @param din_len Maximum size of response in bytes
130 * @return maximum expected number of bytes in response, or <0 if error.
132 static int prepare_proto3_response_buffer(struct cros_ec_dev
*dev
, int din_len
)
134 int in_bytes
= din_len
+ sizeof(struct ec_host_response
);
136 /* Fail if input size is too big */
137 if (in_bytes
> (int)sizeof(dev
->din
)) {
138 debug("%s: Cannot receive %d bytes\n", __func__
, din_len
);
139 return -EC_RES_RESPONSE_TOO_BIG
;
142 /* Return expected size of response packet */
147 * Handle a protocol version 3 response packet.
149 * The packet must already be stored in the device's internal input buffer.
151 * @param dev CROS-EC device
152 * @param dinp Returns pointer to response data
153 * @param din_len Maximum size of response in bytes
154 * @return number of bytes of response data, or <0 if error. Note that error
155 * codes can be from errno.h or -ve EC_RES_INVALID_CHECKSUM values (and they
158 static int handle_proto3_response(struct cros_ec_dev
*dev
,
159 uint8_t **dinp
, int din_len
)
161 struct ec_host_response
*rs
= (struct ec_host_response
*)dev
->din
;
165 cros_ec_dump_data("in-header", -1, dev
->din
, sizeof(*rs
));
167 /* Check input data */
168 if (rs
->struct_version
!= EC_HOST_RESPONSE_VERSION
) {
169 debug("%s: EC response version mismatch\n", __func__
);
170 return -EC_RES_INVALID_RESPONSE
;
174 debug("%s: EC response reserved != 0\n", __func__
);
175 return -EC_RES_INVALID_RESPONSE
;
178 if (rs
->data_len
> din_len
) {
179 debug("%s: EC returned too much data\n", __func__
);
180 return -EC_RES_RESPONSE_TOO_BIG
;
183 cros_ec_dump_data("in-data", -1, dev
->din
+ sizeof(*rs
), rs
->data_len
);
185 /* Update in_bytes to actual data size */
186 in_bytes
= sizeof(*rs
) + rs
->data_len
;
188 /* Verify checksum */
189 csum
= cros_ec_calc_checksum(dev
->din
, in_bytes
);
191 debug("%s: EC response checksum invalid: 0x%02x\n", __func__
,
193 return -EC_RES_INVALID_CHECKSUM
;
196 /* Return error result, if any */
198 return -(int)rs
->result
;
200 /* If we're still here, set response data pointer and return length */
201 *dinp
= (uint8_t *)(rs
+ 1);
206 static int send_command_proto3(struct cros_ec_dev
*dev
,
207 int cmd
, int cmd_version
,
208 const void *dout
, int dout_len
,
209 uint8_t **dinp
, int din_len
)
211 struct dm_cros_ec_ops
*ops
;
212 int out_bytes
, in_bytes
;
215 /* Create request packet */
216 out_bytes
= create_proto3_request(dev
, cmd
, cmd_version
,
221 /* Prepare response buffer */
222 in_bytes
= prepare_proto3_response_buffer(dev
, din_len
);
226 ops
= dm_cros_ec_get_ops(dev
->dev
);
227 rv
= ops
->packet
? ops
->packet(dev
->dev
, out_bytes
, in_bytes
) : -ENOSYS
;
231 /* Process the response */
232 return handle_proto3_response(dev
, dinp
, din_len
);
235 static int send_command(struct cros_ec_dev
*dev
, uint8_t cmd
, int cmd_version
,
236 const void *dout
, int dout_len
,
237 uint8_t **dinp
, int din_len
)
239 struct dm_cros_ec_ops
*ops
;
242 /* Handle protocol version 3 support */
243 if (dev
->protocol_version
== 3) {
244 return send_command_proto3(dev
, cmd
, cmd_version
,
245 dout
, dout_len
, dinp
, din_len
);
248 ops
= dm_cros_ec_get_ops(dev
->dev
);
249 ret
= ops
->command(dev
->dev
, cmd
, cmd_version
,
250 (const uint8_t *)dout
, dout_len
, dinp
, din_len
);
256 * Send a command to the CROS-EC device and return the reply.
258 * The device's internal input/output buffers are used.
260 * @param dev CROS-EC device
261 * @param cmd Command to send (EC_CMD_...)
262 * @param cmd_version Version of command to send (EC_VER_...)
263 * @param dout Output data (may be NULL If dout_len=0)
264 * @param dout_len Size of output data in bytes
265 * @param dinp Response data (may be NULL If din_len=0).
266 * If not NULL, it will be updated to point to the data
267 * and will always be double word aligned (64-bits)
268 * @param din_len Maximum size of response in bytes
269 * @return number of bytes in response, or -ve on error
271 static int ec_command_inptr(struct cros_ec_dev
*dev
, uint8_t cmd
,
272 int cmd_version
, const void *dout
, int dout_len
, uint8_t **dinp
,
278 len
= send_command(dev
, cmd
, cmd_version
, dout
, dout_len
,
281 /* If the command doesn't complete, wait a while */
282 if (len
== -EC_RES_IN_PROGRESS
) {
283 struct ec_response_get_comms_status
*resp
= NULL
;
286 /* Wait for command to complete */
287 start
= get_timer(0);
291 mdelay(50); /* Insert some reasonable delay */
292 ret
= send_command(dev
, EC_CMD_GET_COMMS_STATUS
, 0,
294 (uint8_t **)&resp
, sizeof(*resp
));
298 if (get_timer(start
) > CROS_EC_CMD_TIMEOUT_MS
) {
299 debug("%s: Command %#02x timeout\n",
301 return -EC_RES_TIMEOUT
;
303 } while (resp
->flags
& EC_COMMS_STATUS_PROCESSING
);
305 /* OK it completed, so read the status response */
306 /* not sure why it was 0 for the last argument */
307 len
= send_command(dev
, EC_CMD_RESEND_RESPONSE
, 0,
308 NULL
, 0, &din
, din_len
);
311 debug("%s: len=%d, dinp=%p, *dinp=%p\n", __func__
, len
, dinp
,
312 dinp
? *dinp
: NULL
);
314 /* If we have any data to return, it must be 64bit-aligned */
315 assert(len
<= 0 || !((uintptr_t)din
& 7));
323 * Send a command to the CROS-EC device and return the reply.
325 * The device's internal input/output buffers are used.
327 * @param dev CROS-EC device
328 * @param cmd Command to send (EC_CMD_...)
329 * @param cmd_version Version of command to send (EC_VER_...)
330 * @param dout Output data (may be NULL If dout_len=0)
331 * @param dout_len Size of output data in bytes
332 * @param din Response data (may be NULL If din_len=0).
333 * It not NULL, it is a place for ec_command() to copy the
335 * @param din_len Maximum size of response in bytes
336 * @return number of bytes in response, or -ve on error
338 static int ec_command(struct cros_ec_dev
*dev
, uint8_t cmd
, int cmd_version
,
339 const void *dout
, int dout_len
,
340 void *din
, int din_len
)
345 assert((din_len
== 0) || din
);
346 len
= ec_command_inptr(dev
, cmd
, cmd_version
, dout
, dout_len
,
347 &in_buffer
, din_len
);
350 * If we were asked to put it somewhere, do so, otherwise just
351 * disregard the result.
353 if (din
&& in_buffer
) {
354 assert(len
<= din_len
);
355 memmove(din
, in_buffer
, len
);
361 int cros_ec_scan_keyboard(struct cros_ec_dev
*dev
, struct mbkp_keyscan
*scan
)
363 if (ec_command(dev
, EC_CMD_MKBP_STATE
, 0, NULL
, 0, scan
,
364 sizeof(scan
->data
)) != sizeof(scan
->data
))
370 int cros_ec_read_id(struct cros_ec_dev
*dev
, char *id
, int maxlen
)
372 struct ec_response_get_version
*r
;
374 if (ec_command_inptr(dev
, EC_CMD_GET_VERSION
, 0, NULL
, 0,
375 (uint8_t **)&r
, sizeof(*r
)) != sizeof(*r
))
378 if (maxlen
> (int)sizeof(r
->version_string_ro
))
379 maxlen
= sizeof(r
->version_string_ro
);
381 switch (r
->current_image
) {
383 memcpy(id
, r
->version_string_ro
, maxlen
);
386 memcpy(id
, r
->version_string_rw
, maxlen
);
392 id
[maxlen
- 1] = '\0';
396 int cros_ec_read_version(struct cros_ec_dev
*dev
,
397 struct ec_response_get_version
**versionp
)
399 if (ec_command_inptr(dev
, EC_CMD_GET_VERSION
, 0, NULL
, 0,
400 (uint8_t **)versionp
, sizeof(**versionp
))
401 != sizeof(**versionp
))
407 int cros_ec_read_build_info(struct cros_ec_dev
*dev
, char **strp
)
409 if (ec_command_inptr(dev
, EC_CMD_GET_BUILD_INFO
, 0, NULL
, 0,
410 (uint8_t **)strp
, EC_PROTO2_MAX_PARAM_SIZE
) < 0)
416 int cros_ec_read_current_image(struct cros_ec_dev
*dev
,
417 enum ec_current_image
*image
)
419 struct ec_response_get_version
*r
;
421 if (ec_command_inptr(dev
, EC_CMD_GET_VERSION
, 0, NULL
, 0,
422 (uint8_t **)&r
, sizeof(*r
)) != sizeof(*r
))
425 *image
= r
->current_image
;
429 static int cros_ec_wait_on_hash_done(struct cros_ec_dev
*dev
,
430 struct ec_response_vboot_hash
*hash
)
432 struct ec_params_vboot_hash p
;
435 start
= get_timer(0);
436 while (hash
->status
== EC_VBOOT_HASH_STATUS_BUSY
) {
437 mdelay(50); /* Insert some reasonable delay */
439 p
.cmd
= EC_VBOOT_HASH_GET
;
440 if (ec_command(dev
, EC_CMD_VBOOT_HASH
, 0, &p
, sizeof(p
),
441 hash
, sizeof(*hash
)) < 0)
444 if (get_timer(start
) > CROS_EC_CMD_HASH_TIMEOUT_MS
) {
445 debug("%s: EC_VBOOT_HASH_GET timeout\n", __func__
);
446 return -EC_RES_TIMEOUT
;
453 int cros_ec_read_hash(struct cros_ec_dev
*dev
,
454 struct ec_response_vboot_hash
*hash
)
456 struct ec_params_vboot_hash p
;
459 p
.cmd
= EC_VBOOT_HASH_GET
;
460 if (ec_command(dev
, EC_CMD_VBOOT_HASH
, 0, &p
, sizeof(p
),
461 hash
, sizeof(*hash
)) < 0)
464 /* If the EC is busy calculating the hash, fidget until it's done. */
465 rv
= cros_ec_wait_on_hash_done(dev
, hash
);
469 /* If the hash is valid, we're done. Otherwise, we have to kick it off
470 * again and wait for it to complete. Note that we explicitly assume
471 * that hashing zero bytes is always wrong, even though that would
472 * produce a valid hash value. */
473 if (hash
->status
== EC_VBOOT_HASH_STATUS_DONE
&& hash
->size
)
476 debug("%s: No valid hash (status=%d size=%d). Compute one...\n",
477 __func__
, hash
->status
, hash
->size
);
479 p
.cmd
= EC_VBOOT_HASH_START
;
480 p
.hash_type
= EC_VBOOT_HASH_TYPE_SHA256
;
482 p
.offset
= EC_VBOOT_HASH_OFFSET_RW
;
484 if (ec_command(dev
, EC_CMD_VBOOT_HASH
, 0, &p
, sizeof(p
),
485 hash
, sizeof(*hash
)) < 0)
488 rv
= cros_ec_wait_on_hash_done(dev
, hash
);
492 debug("%s: hash done\n", __func__
);
497 static int cros_ec_invalidate_hash(struct cros_ec_dev
*dev
)
499 struct ec_params_vboot_hash p
;
500 struct ec_response_vboot_hash
*hash
;
502 /* We don't have an explict command for the EC to discard its current
503 * hash value, so we'll just tell it to calculate one that we know is
504 * wrong (we claim that hashing zero bytes is always invalid).
506 p
.cmd
= EC_VBOOT_HASH_RECALC
;
507 p
.hash_type
= EC_VBOOT_HASH_TYPE_SHA256
;
512 debug("%s:\n", __func__
);
514 if (ec_command_inptr(dev
, EC_CMD_VBOOT_HASH
, 0, &p
, sizeof(p
),
515 (uint8_t **)&hash
, sizeof(*hash
)) < 0)
518 /* No need to wait for it to finish */
522 int cros_ec_reboot(struct cros_ec_dev
*dev
, enum ec_reboot_cmd cmd
,
525 struct ec_params_reboot_ec p
;
530 if (ec_command_inptr(dev
, EC_CMD_REBOOT_EC
, 0, &p
, sizeof(p
), NULL
, 0)
534 if (!(flags
& EC_REBOOT_FLAG_ON_AP_SHUTDOWN
)) {
536 * EC reboot will take place immediately so delay to allow it
537 * to complete. Note that some reboot types (EC_REBOOT_COLD)
538 * will reboot the AP as well, in which case we won't actually
542 * TODO(rspangler@chromium.org): Would be nice if we had a
543 * better way to determine when the reboot is complete. Could
544 * we poll a memory-mapped LPC value?
552 int cros_ec_interrupt_pending(struct cros_ec_dev
*dev
)
554 /* no interrupt support : always poll */
555 if (!dm_gpio_is_valid(&dev
->ec_int
))
558 return dm_gpio_get_value(&dev
->ec_int
);
561 int cros_ec_info(struct cros_ec_dev
*dev
, struct ec_response_mkbp_info
*info
)
563 if (ec_command(dev
, EC_CMD_MKBP_INFO
, 0, NULL
, 0, info
,
564 sizeof(*info
)) != sizeof(*info
))
570 int cros_ec_get_host_events(struct cros_ec_dev
*dev
, uint32_t *events_ptr
)
572 struct ec_response_host_event_mask
*resp
;
575 * Use the B copy of the event flags, because the main copy is already
578 if (ec_command_inptr(dev
, EC_CMD_HOST_EVENT_GET_B
, 0, NULL
, 0,
579 (uint8_t **)&resp
, sizeof(*resp
)) < (int)sizeof(*resp
))
582 if (resp
->mask
& EC_HOST_EVENT_MASK(EC_HOST_EVENT_INVALID
))
585 *events_ptr
= resp
->mask
;
589 int cros_ec_clear_host_events(struct cros_ec_dev
*dev
, uint32_t events
)
591 struct ec_params_host_event_mask params
;
593 params
.mask
= events
;
596 * Use the B copy of the event flags, so it affects the data returned
597 * by cros_ec_get_host_events().
599 if (ec_command_inptr(dev
, EC_CMD_HOST_EVENT_CLEAR_B
, 0,
600 ¶ms
, sizeof(params
), NULL
, 0) < 0)
606 int cros_ec_flash_protect(struct cros_ec_dev
*dev
,
607 uint32_t set_mask
, uint32_t set_flags
,
608 struct ec_response_flash_protect
*resp
)
610 struct ec_params_flash_protect params
;
612 params
.mask
= set_mask
;
613 params
.flags
= set_flags
;
615 if (ec_command(dev
, EC_CMD_FLASH_PROTECT
, EC_VER_FLASH_PROTECT
,
616 ¶ms
, sizeof(params
),
617 resp
, sizeof(*resp
)) != sizeof(*resp
))
623 static int cros_ec_check_version(struct cros_ec_dev
*dev
)
625 struct ec_params_hello req
;
626 struct ec_response_hello
*resp
;
628 struct dm_cros_ec_ops
*ops
;
631 ops
= dm_cros_ec_get_ops(dev
->dev
);
632 if (ops
->check_version
) {
633 ret
= ops
->check_version(dev
->dev
);
639 * TODO(sjg@chromium.org).
640 * There is a strange oddity here with the EC. We could just ignore
641 * the response, i.e. pass the last two parameters as NULL and 0.
642 * In this case we won't read back very many bytes from the EC.
643 * On the I2C bus the EC gets upset about this and will try to send
644 * the bytes anyway. This means that we will have to wait for that
645 * to complete before continuing with a new EC command.
647 * This problem is probably unique to the I2C bus.
649 * So for now, just read all the data anyway.
652 /* Try sending a version 3 packet */
653 dev
->protocol_version
= 3;
655 if (ec_command_inptr(dev
, EC_CMD_HELLO
, 0, &req
, sizeof(req
),
656 (uint8_t **)&resp
, sizeof(*resp
)) > 0) {
660 /* Try sending a version 2 packet */
661 dev
->protocol_version
= 2;
662 if (ec_command_inptr(dev
, EC_CMD_HELLO
, 0, &req
, sizeof(req
),
663 (uint8_t **)&resp
, sizeof(*resp
)) > 0) {
668 * Fail if we're still here, since the EC doesn't understand any
669 * protcol version we speak. Version 1 interface without command
670 * version is no longer supported, and we don't know about any new
673 dev
->protocol_version
= 0;
674 printf("%s: ERROR: old EC interface not supported\n", __func__
);
678 int cros_ec_test(struct cros_ec_dev
*dev
)
680 struct ec_params_hello req
;
681 struct ec_response_hello
*resp
;
683 req
.in_data
= 0x12345678;
684 if (ec_command_inptr(dev
, EC_CMD_HELLO
, 0, &req
, sizeof(req
),
685 (uint8_t **)&resp
, sizeof(*resp
)) < sizeof(*resp
)) {
686 printf("ec_command_inptr() returned error\n");
689 if (resp
->out_data
!= req
.in_data
+ 0x01020304) {
690 printf("Received invalid handshake %x\n", resp
->out_data
);
697 int cros_ec_flash_offset(struct cros_ec_dev
*dev
, enum ec_flash_region region
,
698 uint32_t *offset
, uint32_t *size
)
700 struct ec_params_flash_region_info p
;
701 struct ec_response_flash_region_info
*r
;
705 ret
= ec_command_inptr(dev
, EC_CMD_FLASH_REGION_INFO
,
706 EC_VER_FLASH_REGION_INFO
,
707 &p
, sizeof(p
), (uint8_t **)&r
, sizeof(*r
));
708 if (ret
!= sizeof(*r
))
719 int cros_ec_flash_erase(struct cros_ec_dev
*dev
, uint32_t offset
, uint32_t size
)
721 struct ec_params_flash_erase p
;
725 return ec_command_inptr(dev
, EC_CMD_FLASH_ERASE
, 0, &p
, sizeof(p
),
730 * Write a single block to the flash
732 * Write a block of data to the EC flash. The size must not exceed the flash
733 * write block size which you can obtain from cros_ec_flash_write_burst_size().
735 * The offset starts at 0. You can obtain the region information from
736 * cros_ec_flash_offset() to find out where to write for a particular region.
738 * Attempting to write to the region where the EC is currently running from
739 * will result in an error.
741 * @param dev CROS-EC device
742 * @param data Pointer to data buffer to write
743 * @param offset Offset within flash to write to.
744 * @param size Number of bytes to write
745 * @return 0 if ok, -1 on error
747 static int cros_ec_flash_write_block(struct cros_ec_dev
*dev
,
748 const uint8_t *data
, uint32_t offset
, uint32_t size
)
750 struct ec_params_flash_write p
;
754 assert(data
&& p
.size
<= EC_FLASH_WRITE_VER0_SIZE
);
755 memcpy(&p
+ 1, data
, p
.size
);
757 return ec_command_inptr(dev
, EC_CMD_FLASH_WRITE
, 0,
758 &p
, sizeof(p
), NULL
, 0) >= 0 ? 0 : -1;
762 * Return optimal flash write burst size
764 static int cros_ec_flash_write_burst_size(struct cros_ec_dev
*dev
)
766 return EC_FLASH_WRITE_VER0_SIZE
;
770 * Check if a block of data is erased (all 0xff)
772 * This function is useful when dealing with flash, for checking whether a
773 * data block is erased and thus does not need to be programmed.
775 * @param data Pointer to data to check (must be word-aligned)
776 * @param size Number of bytes to check (must be word-aligned)
777 * @return 0 if erased, non-zero if any word is not erased
779 static int cros_ec_data_is_erased(const uint32_t *data
, int size
)
782 size
/= sizeof(uint32_t);
783 for (; size
> 0; size
-= 4, data
++)
790 int cros_ec_flash_write(struct cros_ec_dev
*dev
, const uint8_t *data
,
791 uint32_t offset
, uint32_t size
)
793 uint32_t burst
= cros_ec_flash_write_burst_size(dev
);
798 * TODO: round up to the nearest multiple of write size. Can get away
799 * without that on link right now because its write size is 4 bytes.
802 for (off
= offset
; off
< end
; off
+= burst
, data
+= burst
) {
805 /* If the data is empty, there is no point in programming it */
806 todo
= min(end
- off
, burst
);
807 if (dev
->optimise_flash_write
&&
808 cros_ec_data_is_erased((uint32_t *)data
, todo
))
811 ret
= cros_ec_flash_write_block(dev
, data
, off
, todo
);
820 * Read a single block from the flash
822 * Read a block of data from the EC flash. The size must not exceed the flash
823 * write block size which you can obtain from cros_ec_flash_write_burst_size().
825 * The offset starts at 0. You can obtain the region information from
826 * cros_ec_flash_offset() to find out where to read for a particular region.
828 * @param dev CROS-EC device
829 * @param data Pointer to data buffer to read into
830 * @param offset Offset within flash to read from
831 * @param size Number of bytes to read
832 * @return 0 if ok, -1 on error
834 static int cros_ec_flash_read_block(struct cros_ec_dev
*dev
, uint8_t *data
,
835 uint32_t offset
, uint32_t size
)
837 struct ec_params_flash_read p
;
842 return ec_command(dev
, EC_CMD_FLASH_READ
, 0,
843 &p
, sizeof(p
), data
, size
) >= 0 ? 0 : -1;
846 int cros_ec_flash_read(struct cros_ec_dev
*dev
, uint8_t *data
, uint32_t offset
,
849 uint32_t burst
= cros_ec_flash_write_burst_size(dev
);
854 for (off
= offset
; off
< end
; off
+= burst
, data
+= burst
) {
855 ret
= cros_ec_flash_read_block(dev
, data
, off
,
856 min(end
- off
, burst
));
864 int cros_ec_flash_update_rw(struct cros_ec_dev
*dev
,
865 const uint8_t *image
, int image_size
)
867 uint32_t rw_offset
, rw_size
;
870 if (cros_ec_flash_offset(dev
, EC_FLASH_REGION_RW
, &rw_offset
, &rw_size
))
872 if (image_size
> (int)rw_size
)
875 /* Invalidate the existing hash, just in case the AP reboots
876 * unexpectedly during the update. If that happened, the EC RW firmware
877 * would be invalid, but the EC would still have the original hash.
879 ret
= cros_ec_invalidate_hash(dev
);
884 * Erase the entire RW section, so that the EC doesn't see any garbage
885 * past the new image if it's smaller than the current image.
887 * TODO: could optimize this to erase just the current image, since
888 * presumably everything past that is 0xff's. But would still need to
889 * round up to the nearest multiple of erase size.
891 ret
= cros_ec_flash_erase(dev
, rw_offset
, rw_size
);
895 /* Write the image */
896 ret
= cros_ec_flash_write(dev
, image
, rw_offset
, image_size
);
903 int cros_ec_read_vbnvcontext(struct cros_ec_dev
*dev
, uint8_t *block
)
905 struct ec_params_vbnvcontext p
;
908 p
.op
= EC_VBNV_CONTEXT_OP_READ
;
910 len
= ec_command(dev
, EC_CMD_VBNV_CONTEXT
, EC_VER_VBNV_CONTEXT
,
911 &p
, sizeof(p
), block
, EC_VBNV_BLOCK_SIZE
);
912 if (len
< EC_VBNV_BLOCK_SIZE
)
918 int cros_ec_write_vbnvcontext(struct cros_ec_dev
*dev
, const uint8_t *block
)
920 struct ec_params_vbnvcontext p
;
923 p
.op
= EC_VBNV_CONTEXT_OP_WRITE
;
924 memcpy(p
.block
, block
, sizeof(p
.block
));
926 len
= ec_command_inptr(dev
, EC_CMD_VBNV_CONTEXT
, EC_VER_VBNV_CONTEXT
,
927 &p
, sizeof(p
), NULL
, 0);
934 int cros_ec_set_ldo(struct cros_ec_dev
*dev
, uint8_t index
, uint8_t state
)
936 struct ec_params_ldo_set params
;
938 params
.index
= index
;
939 params
.state
= state
;
941 if (ec_command_inptr(dev
, EC_CMD_LDO_SET
, 0,
942 ¶ms
, sizeof(params
),
949 int cros_ec_get_ldo(struct cros_ec_dev
*dev
, uint8_t index
, uint8_t *state
)
951 struct ec_params_ldo_get params
;
952 struct ec_response_ldo_get
*resp
;
954 params
.index
= index
;
956 if (ec_command_inptr(dev
, EC_CMD_LDO_GET
, 0,
957 ¶ms
, sizeof(params
),
958 (uint8_t **)&resp
, sizeof(*resp
)) != sizeof(*resp
))
961 *state
= resp
->state
;
966 int cros_ec_register(struct udevice
*dev
)
968 struct cros_ec_dev
*cdev
= dev_get_uclass_priv(dev
);
969 const void *blob
= gd
->fdt_blob
;
970 int node
= dev
->of_offset
;
974 gpio_request_by_name(dev
, "ec-interrupt", 0, &cdev
->ec_int
,
976 cdev
->optimise_flash_write
= fdtdec_get_bool(blob
, node
,
977 "optimise-flash-write");
979 if (cros_ec_check_version(cdev
)) {
980 debug("%s: Could not detect CROS-EC version\n", __func__
);
981 return -CROS_EC_ERR_CHECK_VERSION
;
984 if (cros_ec_read_id(cdev
, id
, sizeof(id
))) {
985 debug("%s: Could not read KBC ID\n", __func__
);
986 return -CROS_EC_ERR_READ_ID
;
989 /* Remember this device for use by the cros_ec command */
990 debug("Google Chrome EC v%d CROS-EC driver ready, id '%s'\n",
991 cdev
->protocol_version
, id
);
996 int cros_ec_decode_region(int argc
, char * const argv
[])
999 if (0 == strcmp(*argv
, "rw"))
1000 return EC_FLASH_REGION_RW
;
1001 else if (0 == strcmp(*argv
, "ro"))
1002 return EC_FLASH_REGION_RO
;
1004 debug("%s: Invalid region '%s'\n", __func__
, *argv
);
1006 debug("%s: Missing region parameter\n", __func__
);
1012 int cros_ec_decode_ec_flash(const void *blob
, int node
,
1013 struct fdt_cros_ec
*config
)
1017 flash_node
= fdt_subnode_offset(blob
, node
, "flash");
1018 if (flash_node
< 0) {
1019 debug("Failed to find flash node\n");
1023 if (fdtdec_read_fmap_entry(blob
, flash_node
, "flash",
1025 debug("Failed to decode flash node in chrome-ec'\n");
1029 config
->flash_erase_value
= fdtdec_get_int(blob
, flash_node
,
1031 for (node
= fdt_first_subnode(blob
, flash_node
); node
>= 0;
1032 node
= fdt_next_subnode(blob
, node
)) {
1033 const char *name
= fdt_get_name(blob
, node
, NULL
);
1034 enum ec_flash_region region
;
1036 if (0 == strcmp(name
, "ro")) {
1037 region
= EC_FLASH_REGION_RO
;
1038 } else if (0 == strcmp(name
, "rw")) {
1039 region
= EC_FLASH_REGION_RW
;
1040 } else if (0 == strcmp(name
, "wp-ro")) {
1041 region
= EC_FLASH_REGION_WP_RO
;
1043 debug("Unknown EC flash region name '%s'\n", name
);
1047 if (fdtdec_read_fmap_entry(blob
, node
, "reg",
1048 &config
->region
[region
])) {
1049 debug("Failed to decode flash region in chrome-ec'\n");
1057 int cros_ec_i2c_xfer_old(struct cros_ec_dev
*dev
, uchar chip
, uint addr
,
1058 int alen
, uchar
*buffer
, int len
, int is_read
)
1061 struct ec_params_i2c_passthru p
;
1062 uint8_t outbuf
[EC_PROTO2_MAX_PARAM_SIZE
];
1065 struct ec_response_i2c_passthru r
;
1066 uint8_t inbuf
[EC_PROTO2_MAX_PARAM_SIZE
];
1068 struct ec_params_i2c_passthru
*p
= ¶ms
.p
;
1069 struct ec_response_i2c_passthru
*r
= &response
.r
;
1070 struct ec_params_i2c_passthru_msg
*msg
= p
->msg
;
1072 int read_len
, write_len
;
1079 printf("Unsupported address length %d\n", alen
);
1088 write_len
= alen
+ len
;
1092 size
= sizeof(*p
) + p
->num_msgs
* sizeof(*msg
);
1093 if (size
+ write_len
> sizeof(params
)) {
1094 puts("Params too large for buffer\n");
1097 if (sizeof(*r
) + read_len
> sizeof(response
)) {
1098 puts("Read length too big for buffer\n");
1102 /* Create a message to write the register address and optional data */
1103 pdata
= (uint8_t *)p
+ size
;
1104 msg
->addr_flags
= chip
;
1105 msg
->len
= write_len
;
1108 memcpy(pdata
+ 1, buffer
, len
);
1112 msg
->addr_flags
= chip
| EC_I2C_FLAG_READ
;
1113 msg
->len
= read_len
;
1116 rv
= ec_command(dev
, EC_CMD_I2C_PASSTHRU
, 0, p
, size
+ write_len
,
1117 r
, sizeof(*r
) + read_len
);
1121 /* Parse response */
1122 if (r
->i2c_status
& EC_I2C_STATUS_ERROR
) {
1123 printf("Transfer failed with status=0x%x\n", r
->i2c_status
);
1127 if (rv
< sizeof(*r
) + read_len
) {
1128 puts("Truncated read response\n");
1133 memcpy(buffer
, r
->data
, read_len
);
1138 int cros_ec_i2c_tunnel(struct udevice
*dev
, struct i2c_msg
*in
, int nmsgs
)
1140 struct cros_ec_dev
*cdev
= dev_get_uclass_priv(dev
);
1142 struct ec_params_i2c_passthru p
;
1143 uint8_t outbuf
[EC_PROTO2_MAX_PARAM_SIZE
];
1146 struct ec_response_i2c_passthru r
;
1147 uint8_t inbuf
[EC_PROTO2_MAX_PARAM_SIZE
];
1149 struct ec_params_i2c_passthru
*p
= ¶ms
.p
;
1150 struct ec_response_i2c_passthru
*r
= &response
.r
;
1151 struct ec_params_i2c_passthru_msg
*msg
;
1152 uint8_t *pdata
, *read_ptr
= NULL
;
1160 p
->num_msgs
= nmsgs
;
1161 size
= sizeof(*p
) + p
->num_msgs
* sizeof(*msg
);
1163 /* Create a message to write the register address and optional data */
1164 pdata
= (uint8_t *)p
+ size
;
1167 for (i
= 0, msg
= p
->msg
; i
< nmsgs
; i
++, msg
++, in
++) {
1168 bool is_read
= in
->flags
& I2C_M_RD
;
1170 msg
->addr_flags
= in
->addr
;
1173 msg
->addr_flags
|= EC_I2C_FLAG_READ
;
1174 read_len
+= in
->len
;
1176 if (sizeof(*r
) + read_len
> sizeof(response
)) {
1177 puts("Read length too big for buffer\n");
1181 if (pdata
- (uint8_t *)p
+ in
->len
> sizeof(params
)) {
1182 puts("Params too large for buffer\n");
1185 memcpy(pdata
, in
->buf
, in
->len
);
1190 rv
= ec_command(cdev
, EC_CMD_I2C_PASSTHRU
, 0, p
, pdata
- (uint8_t *)p
,
1191 r
, sizeof(*r
) + read_len
);
1195 /* Parse response */
1196 if (r
->i2c_status
& EC_I2C_STATUS_ERROR
) {
1197 printf("Transfer failed with status=0x%x\n", r
->i2c_status
);
1201 if (rv
< sizeof(*r
) + read_len
) {
1202 puts("Truncated read response\n");
1206 /* We only support a single read message for each transfer */
1208 memcpy(read_ptr
, r
->data
, read_len
);
1213 #ifdef CONFIG_CMD_CROS_EC
1216 * Perform a flash read or write command
1218 * @param dev CROS-EC device to read/write
1219 * @param is_write 1 do to a write, 0 to do a read
1220 * @param argc Number of arguments
1221 * @param argv Arguments (2 is region, 3 is address)
1222 * @return 0 for ok, 1 for a usage error or -ve for ec command error
1223 * (negative EC_RES_...)
1225 static int do_read_write(struct cros_ec_dev
*dev
, int is_write
, int argc
,
1226 char * const argv
[])
1228 uint32_t offset
, size
= -1U, region_size
;
1234 region
= cros_ec_decode_region(argc
- 2, argv
+ 2);
1239 addr
= simple_strtoul(argv
[3], &endp
, 16);
1240 if (*argv
[3] == 0 || *endp
!= 0)
1243 size
= simple_strtoul(argv
[4], &endp
, 16);
1244 if (*argv
[4] == 0 || *endp
!= 0)
1248 ret
= cros_ec_flash_offset(dev
, region
, &offset
, ®ion_size
);
1250 debug("%s: Could not read region info\n", __func__
);
1257 cros_ec_flash_write(dev
, (uint8_t *)addr
, offset
, size
) :
1258 cros_ec_flash_read(dev
, (uint8_t *)addr
, offset
, size
);
1260 debug("%s: Could not %s region\n", __func__
,
1261 is_write
? "write" : "read");
1269 * get_alen() - Small parser helper function to get address length
1271 * Returns the address length.
1273 static uint
get_alen(char *arg
)
1279 for (j
= 0; j
< 8; j
++) {
1280 if (arg
[j
] == '.') {
1281 alen
= arg
[j
+1] - '0';
1283 } else if (arg
[j
] == '\0') {
1290 #define DISP_LINE_LEN 16
1293 * TODO(sjg@chromium.org): This code copied almost verbatim from cmd_i2c.c
1294 * so we can remove it later.
1296 static int cros_ec_i2c_md(struct cros_ec_dev
*dev
, int flag
, int argc
,
1297 char * const argv
[])
1300 uint addr
, alen
, length
= 0x10;
1301 int j
, nbytes
, linebytes
;
1304 return CMD_RET_USAGE
;
1306 if (1 || (flag
& CMD_FLAG_REPEAT
) == 0) {
1308 * New command specified.
1314 chip
= simple_strtoul(argv
[0], NULL
, 16);
1317 * I2C data address within the chip. This can be 1 or
1318 * 2 bytes long. Some day it might be 3 bytes long :-).
1320 addr
= simple_strtoul(argv
[1], NULL
, 16);
1321 alen
= get_alen(argv
[1]);
1323 return CMD_RET_USAGE
;
1326 * If another parameter, it is the length to display.
1327 * Length is the number of objects, not number of bytes.
1330 length
= simple_strtoul(argv
[2], NULL
, 16);
1336 * We buffer all read data, so we can make sure data is read only
1341 unsigned char linebuf
[DISP_LINE_LEN
];
1344 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
1346 if (cros_ec_i2c_xfer_old(dev
, chip
, addr
, alen
, linebuf
,
1348 puts("Error reading the chip.\n");
1350 printf("%04x:", addr
);
1352 for (j
= 0; j
< linebytes
; j
++) {
1353 printf(" %02x", *cp
++);
1358 for (j
= 0; j
< linebytes
; j
++) {
1359 if ((*cp
< 0x20) || (*cp
> 0x7e))
1367 nbytes
-= linebytes
;
1368 } while (nbytes
> 0);
1373 static int cros_ec_i2c_mw(struct cros_ec_dev
*dev
, int flag
, int argc
,
1374 char * const argv
[])
1382 if ((argc
< 3) || (argc
> 4))
1383 return CMD_RET_USAGE
;
1386 * Chip is always specified.
1388 chip
= simple_strtoul(argv
[0], NULL
, 16);
1391 * Address is always specified.
1393 addr
= simple_strtoul(argv
[1], NULL
, 16);
1394 alen
= get_alen(argv
[1]);
1396 return CMD_RET_USAGE
;
1399 * Value to write is always specified.
1401 byte
= simple_strtoul(argv
[2], NULL
, 16);
1407 count
= simple_strtoul(argv
[3], NULL
, 16);
1411 while (count
-- > 0) {
1412 if (cros_ec_i2c_xfer_old(dev
, chip
, addr
++, alen
, &byte
, 1, 0))
1413 puts("Error writing the chip.\n");
1415 * Wait for the write to complete. The write can take
1416 * up to 10mSec (we allow a little more time).
1419 * No write delay with FRAM devices.
1421 #if !defined(CONFIG_SYS_I2C_FRAM)
1429 /* Temporary code until we have driver model and can use the i2c command */
1430 static int cros_ec_i2c_passthrough(struct cros_ec_dev
*dev
, int flag
,
1431 int argc
, char * const argv
[])
1436 return CMD_RET_USAGE
;
1439 if (0 == strcmp("md", cmd
))
1440 cros_ec_i2c_md(dev
, flag
, argc
, argv
);
1441 else if (0 == strcmp("mw", cmd
))
1442 cros_ec_i2c_mw(dev
, flag
, argc
, argv
);
1444 return CMD_RET_USAGE
;
1449 static int do_cros_ec(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1451 struct cros_ec_dev
*dev
;
1452 struct udevice
*udev
;
1457 return CMD_RET_USAGE
;
1460 if (0 == strcmp("init", cmd
)) {
1461 /* Remove any existing device */
1462 ret
= uclass_find_device(UCLASS_CROS_EC
, 0, &udev
);
1464 device_remove(udev
);
1465 ret
= uclass_get_device(UCLASS_CROS_EC
, 0, &udev
);
1467 printf("Could not init cros_ec device (err %d)\n", ret
);
1473 ret
= uclass_get_device(UCLASS_CROS_EC
, 0, &udev
);
1475 printf("Cannot get cros-ec device (err=%d)\n", ret
);
1478 dev
= dev_get_uclass_priv(udev
);
1479 if (0 == strcmp("id", cmd
)) {
1482 if (cros_ec_read_id(dev
, id
, sizeof(id
))) {
1483 debug("%s: Could not read KBC ID\n", __func__
);
1487 } else if (0 == strcmp("info", cmd
)) {
1488 struct ec_response_mkbp_info info
;
1490 if (cros_ec_info(dev
, &info
)) {
1491 debug("%s: Could not read KBC info\n", __func__
);
1494 printf("rows = %u\n", info
.rows
);
1495 printf("cols = %u\n", info
.cols
);
1496 printf("switches = %#x\n", info
.switches
);
1497 } else if (0 == strcmp("curimage", cmd
)) {
1498 enum ec_current_image image
;
1500 if (cros_ec_read_current_image(dev
, &image
)) {
1501 debug("%s: Could not read KBC image\n", __func__
);
1504 printf("%d\n", image
);
1505 } else if (0 == strcmp("hash", cmd
)) {
1506 struct ec_response_vboot_hash hash
;
1509 if (cros_ec_read_hash(dev
, &hash
)) {
1510 debug("%s: Could not read KBC hash\n", __func__
);
1514 if (hash
.hash_type
== EC_VBOOT_HASH_TYPE_SHA256
)
1515 printf("type: SHA-256\n");
1517 printf("type: %d\n", hash
.hash_type
);
1519 printf("offset: 0x%08x\n", hash
.offset
);
1520 printf("size: 0x%08x\n", hash
.size
);
1523 for (i
= 0; i
< hash
.digest_size
; i
++)
1524 printf("%02x", hash
.hash_digest
[i
]);
1526 } else if (0 == strcmp("reboot", cmd
)) {
1528 enum ec_reboot_cmd cmd
;
1530 if (argc
>= 3 && !strcmp(argv
[2], "cold"))
1531 cmd
= EC_REBOOT_COLD
;
1533 region
= cros_ec_decode_region(argc
- 2, argv
+ 2);
1534 if (region
== EC_FLASH_REGION_RO
)
1535 cmd
= EC_REBOOT_JUMP_RO
;
1536 else if (region
== EC_FLASH_REGION_RW
)
1537 cmd
= EC_REBOOT_JUMP_RW
;
1539 return CMD_RET_USAGE
;
1542 if (cros_ec_reboot(dev
, cmd
, 0)) {
1543 debug("%s: Could not reboot KBC\n", __func__
);
1546 } else if (0 == strcmp("events", cmd
)) {
1549 if (cros_ec_get_host_events(dev
, &events
)) {
1550 debug("%s: Could not read host events\n", __func__
);
1553 printf("0x%08x\n", events
);
1554 } else if (0 == strcmp("clrevents", cmd
)) {
1555 uint32_t events
= 0x7fffffff;
1558 events
= simple_strtol(argv
[2], NULL
, 0);
1560 if (cros_ec_clear_host_events(dev
, events
)) {
1561 debug("%s: Could not clear host events\n", __func__
);
1564 } else if (0 == strcmp("read", cmd
)) {
1565 ret
= do_read_write(dev
, 0, argc
, argv
);
1567 return CMD_RET_USAGE
;
1568 } else if (0 == strcmp("write", cmd
)) {
1569 ret
= do_read_write(dev
, 1, argc
, argv
);
1571 return CMD_RET_USAGE
;
1572 } else if (0 == strcmp("erase", cmd
)) {
1573 int region
= cros_ec_decode_region(argc
- 2, argv
+ 2);
1574 uint32_t offset
, size
;
1577 return CMD_RET_USAGE
;
1578 if (cros_ec_flash_offset(dev
, region
, &offset
, &size
)) {
1579 debug("%s: Could not read region info\n", __func__
);
1582 ret
= cros_ec_flash_erase(dev
, offset
, size
);
1584 debug("%s: Could not erase region\n",
1588 } else if (0 == strcmp("regioninfo", cmd
)) {
1589 int region
= cros_ec_decode_region(argc
- 2, argv
+ 2);
1590 uint32_t offset
, size
;
1593 return CMD_RET_USAGE
;
1594 ret
= cros_ec_flash_offset(dev
, region
, &offset
, &size
);
1596 debug("%s: Could not read region info\n", __func__
);
1598 printf("Region: %s\n", region
== EC_FLASH_REGION_RO
?
1600 printf("Offset: %x\n", offset
);
1601 printf("Size: %x\n", size
);
1603 } else if (0 == strcmp("vbnvcontext", cmd
)) {
1604 uint8_t block
[EC_VBNV_BLOCK_SIZE
];
1607 unsigned long result
;
1610 ret
= cros_ec_read_vbnvcontext(dev
, block
);
1612 printf("vbnv_block: ");
1613 for (i
= 0; i
< EC_VBNV_BLOCK_SIZE
; i
++)
1614 printf("%02x", block
[i
]);
1619 * TODO(clchiou): Move this to a utility function as
1620 * cmd_spi might want to call it.
1622 memset(block
, 0, EC_VBNV_BLOCK_SIZE
);
1623 len
= strlen(argv
[2]);
1625 for (i
= 0; i
< EC_VBNV_BLOCK_SIZE
; i
++) {
1628 buf
[0] = argv
[2][i
* 2];
1629 if (i
* 2 + 1 >= len
)
1632 buf
[1] = argv
[2][i
* 2 + 1];
1633 strict_strtoul(buf
, 16, &result
);
1636 ret
= cros_ec_write_vbnvcontext(dev
, block
);
1639 debug("%s: Could not %s VbNvContext\n", __func__
,
1640 argc
<= 2 ? "read" : "write");
1642 } else if (0 == strcmp("test", cmd
)) {
1643 int result
= cros_ec_test(dev
);
1646 printf("Test failed with error %d\n", result
);
1648 puts("Test passed\n");
1649 } else if (0 == strcmp("version", cmd
)) {
1650 struct ec_response_get_version
*p
;
1653 ret
= cros_ec_read_version(dev
, &p
);
1655 /* Print versions */
1656 printf("RO version: %1.*s\n",
1657 (int)sizeof(p
->version_string_ro
),
1658 p
->version_string_ro
);
1659 printf("RW version: %1.*s\n",
1660 (int)sizeof(p
->version_string_rw
),
1661 p
->version_string_rw
);
1662 printf("Firmware copy: %s\n",
1664 ARRAY_SIZE(ec_current_image_name
) ?
1665 ec_current_image_name
[p
->current_image
] :
1667 ret
= cros_ec_read_build_info(dev
, &build_string
);
1669 printf("Build info: %s\n", build_string
);
1671 } else if (0 == strcmp("ldo", cmd
)) {
1672 uint8_t index
, state
;
1676 return CMD_RET_USAGE
;
1677 index
= simple_strtoul(argv
[2], &endp
, 10);
1678 if (*argv
[2] == 0 || *endp
!= 0)
1679 return CMD_RET_USAGE
;
1681 state
= simple_strtoul(argv
[3], &endp
, 10);
1682 if (*argv
[3] == 0 || *endp
!= 0)
1683 return CMD_RET_USAGE
;
1684 ret
= cros_ec_set_ldo(dev
, index
, state
);
1686 ret
= cros_ec_get_ldo(dev
, index
, &state
);
1688 printf("LDO%d: %s\n", index
,
1689 state
== EC_LDO_STATE_ON
?
1695 debug("%s: Could not access LDO%d\n", __func__
, index
);
1698 } else if (0 == strcmp("i2c", cmd
)) {
1699 ret
= cros_ec_i2c_passthrough(dev
, flag
, argc
- 2, argv
+ 2);
1701 return CMD_RET_USAGE
;
1705 printf("Error: CROS-EC command failed (error %d)\n", ret
);
1712 int cros_ec_post_bind(struct udevice
*dev
)
1714 /* Scan for available EC devices (e.g. I2C tunnel) */
1715 return dm_scan_fdt_node(dev
, gd
->fdt_blob
, dev
->of_offset
, false);
1719 crosec
, 6, 1, do_cros_ec
,
1720 "CROS-EC utility command",
1721 "init Re-init CROS-EC (done on startup automatically)\n"
1722 "crosec id Read CROS-EC ID\n"
1723 "crosec info Read CROS-EC info\n"
1724 "crosec curimage Read CROS-EC current image\n"
1725 "crosec hash Read CROS-EC hash\n"
1726 "crosec reboot [rw | ro | cold] Reboot CROS-EC\n"
1727 "crosec events Read CROS-EC host events\n"
1728 "crosec clrevents [mask] Clear CROS-EC host events\n"
1729 "crosec regioninfo <ro|rw> Read image info\n"
1730 "crosec erase <ro|rw> Erase EC image\n"
1731 "crosec read <ro|rw> <addr> [<size>] Read EC image\n"
1732 "crosec write <ro|rw> <addr> [<size>] Write EC image\n"
1733 "crosec vbnvcontext [hexstring] Read [write] VbNvContext from EC\n"
1734 "crosec ldo <idx> [<state>] Switch/Read LDO state\n"
1735 "crosec test run tests on cros_ec\n"
1736 "crosec version Read CROS-EC version\n"
1737 "crosec i2c md chip address[.0, .1, .2] [# of objects] - read from I2C passthru\n"
1738 "crosec i2c mw chip address[.0, .1, .2] value [count] - write to I2C passthru (fill)"
1742 UCLASS_DRIVER(cros_ec
) = {
1743 .id
= UCLASS_CROS_EC
,
1745 .per_device_auto_alloc_size
= sizeof(struct cros_ec_dev
),
1746 .post_bind
= cros_ec_post_bind
,